Last seen: Jan 13, 2022
(a) asexual reproduction Explanation: Gemmule is a type of internal bud formed in sponges to pass the unfavourable season. It is helpful in asexua...
(a) One Explanation: Birds have only one ovary (left) which reduces their body weight. It is an adaptation for flight.
(c) Cholesterol Explanation: Fish meal has good nutritive value because it contains easily digestive proteins (55 – 77%), minerals (10 – 20%) and ...
(b) homeothermal Explanation: Birds are warm blooded/homeothermal animals. Their body temperature is independent of that of their external environ...
(b) Python Explanation: Python is the largest non-poisonous snake.
(a) placoid Explanation: Chondrichthyes have placoid scales and teleosts have cycloid and ctenoid type of scales.
(c) Crinoidea Explanation: Antedon (sea lily/feather star) is found in the class crinoidea of phylum echinodermata.
(d) mollusca Explanation: Copper containing pigment, hemocyanin is found in molluscs.
(b) digenetic Explanation: Life cycle of Taenia is digenetic. Their primary host is pig and secondary is man.
(d) hypnotoxin Explanation: Penetrant, the largest nematocysts in Hydra produce hypnotoxin.
(b) archaeocytes Explanation: In sponges, archaeocytes are totipotent cells which can transform into sclerocytes, spongocytes or collencytes. They...
(a) collaterial gland Explanation: A pair of unequal, branched collaterial glands (opening separately into genital chamber) form an egg case oothe...
(a) Ophiuroidea Explanation: Basket star (Astropecten) belongs to class ophiuroidea of phylum echinoderm.
(b) heterocoelous Explanation: The vertebrae in birds are of heterocoelous type.
(c) fishes Explanation: Weberian ossicles are the chain of 4 small bones that connect air bladder and internal ear of teleost fishes. They serve t...
(c) 6, 7, 8, 9 Explanation: Four pairs of small spermathecae are present on the intersegmental groove of 5 & 6, 6 & 7, 7 & 8 and 8 &am...
(d) Schistosoma Explanation: Platyhelminthes are flat worms, e.g. blood fluke, Schistosoma.
(b) choanocytes Explanation: Water current in Leucosolenia is producedby flagellated choanocytes.
(b) Solitary or colonial. Explanation: Corals belong to class anthozoa which exist as solitary or colonial. Corals is the rock like external skele...
(d) thoracico-lumbar region Explanation: Sympathetic nerves in mammals arise from thoracico–lumbar region. Sympathetic nervous system is represent...